Question

There are two numbers. If 2490 is subtracted from one number then we get the other number. The algebraic expression depicting this information is:

• A. a + b = 2490
• B. a - b = 2490
• C. a + b + 2490 = 0
• D. a – b + 2490 = 0

Answer 1

The correct option is B

a - b = 2490

Let the two numbers be $a$ and $b$.

If 2490 is subtracted from the number, we get (a - 2490)

If 2490 is subtracted from a number we get the other number:
$\Rightarrow$ (a – 2490) = b
$\Rightarrow$ (a – b) = 2490

The variables can be any two alphabets. It need not necessarily be $x$ and $y$ or $a$ and $b$.
The algebraic expression depicting this information is (a – b) = 2490